Head stock of guitar



FIG. 1 is a front view of a head stock of guitar showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top view thereof; and,

FIG. 9 is a bottom view thereof. 

The ornamental design for the head stock of guitar, as shown and described. 